close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPH0970090

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0970090
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device having a sound conduit.
[0002]
2. Description of the Related Art FIG. 7 shows a conventional sound conduit speaker apparatus,
in which 1 is a speaker unit, 2 is a sound conduit attached to the speaker unit 1, 3 is a sound
conduit inlet, and 4 is a sound conduit. It is an exit.
[0003]
In such a configuration, the sound reproduced by the speaker unit 1 enters the sound conduit 2
from the sound conduit inlet 3, is guided through the sound conduit 2 to the sound conduit
outlet 4, and is propagated into the air.
[0004]
Since the speaker apparatus having the conventional sound conduit is configured as described
above, a standing wave is generated at a frequency determined by the total length L of the sound
conduit 2, and harmonic distortion is generated. There is a problem that the sound quality
increases due to the increase.
[0005]
17-04-2019
1
The present invention has been made to solve the above-mentioned problems, and it is an object
of the present invention to provide a speaker device capable of suppressing standing waves and
reducing harmonic distortion to improve sound quality. It is.
[0006]
A speaker device according to the present invention comprises a sound conduit having a ridge on
the inlet side, a speaker unit coupled to the ridge of the sound conduit and having a diameter
larger than the diameter of the inlet of the sound conduit, It is provided with a sound absorbing
material attached to the surface facing the speaker unit around the sound conduit inlet.
[0007]
The sound absorbing material is attached to the entire inner surface of the buttocks around the
inlet of the sound conduit.
[0008]
Also, the sound conduit is provided with a Helmholtz resonator having an opening inside the
sound conduit.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view of a speaker device according to Embodiment 1 of the present
invention, FIG. 2 is a front view of a cross section taken along the line I--II in FIG. A sound
channel inlet having a cross-sectional quadrilateral smaller than the aperture of the speaker unit
1, 2a a ridge integrally formed with the sound channel 2 at the sound channel inlet side, 4 a
sound channel outlet, and 5 a sound conduit inlet outer periphery Thus, it is a sound absorbing
material attached to one side wall of the ridge portion 2 a so as to face the peripheral portion of
the speaker unit 1.
The sound conduit 2 and the speaker unit 1 are connected at the buttocks 2a.
17-04-2019
2
[0010]
Next, the operation will be described.
Of the sound reproduced by the speaker unit 1, the sound from the vicinity of the edge of the
speaker unit 1, in particular harmonic distortion, directly strikes the sound absorbing material 5
and is absorbed.
The sound from the cone paper center of the speaker unit 1 is corrected for standing waves by
the sound absorbing material 5 around the sound inlet 3 and is propagated through the sound
conduit 2 to the air from the sound outlet 4.
[0011]
The shape of the speaker unit is not limited to a circle as shown in FIG. 1 and FIG. 2, but an
elliptical shape as shown in FIG. 3 and FIG. 4 has the same effect.
4 is a front view of the cross section of the roller line of FIG. 3 in the direction of the arrow.
[0012]
Second Embodiment
5 is a side sectional view of a speaker device showing Embodiment 2 of the present invention,
wherein 1 is a speaker unit, 2 is a sound conduit, 3 is a sound conduit inlet, 4 is a sound conduit
outlet, 5 is a sound absorbing material, and 2a is a weir. The part 6 is a Helmholtz resonator
provided, for example, two in communication with the inner side wall of the sound conduit 2.
[0013]
17-04-2019
3
In such a configuration, of the sound reproduced by the speaker unit 1, the sound from the
vicinity of the edge of the speaker unit 1, in particular, the harmonic distortion, directly strikes
the sound absorbing material 5 and is absorbed. The sound from the cone paper center of the
speaker unit 1 is suppressed by the sound absorbing material 5 around the sound inlet 3 and the
Helmholtz resonator 6 connected to the inner side wall of the sound conduit 2 so that the
generation of the standing wave is suppressed. From the air into the air.
[0014]
In any of the first embodiment and the second embodiment, the sound absorbing material 5 is
provided only on the surface facing the speaker of the collar portion 2a. For example, as shown
by the dotted line in FIG. The sound absorbing material 5 may be provided on the entire inner
surface of the flange portion 2a.
[0015]
FIG. 6 is a comparison of the frequency characteristics of the conventional speaker device and
those of the first embodiment and the second embodiment.
The solid line in the figure is the conventional characteristic, the broken line is that of the first
embodiment, and the dashed line is that of the second embodiment. As apparent from the figure,
it can be seen that the generation of standing waves is suppressed or reduced in the present
invention.
[0016]
Brief description of the drawings
[0017]
FIG. 1 is a side cross-sectional view of a speaker device according to Embodiment 1 of the
present invention.
[0018]
FIG. 2 is a front view of a cross section taken along line I-I in FIG.
17-04-2019
4
[0019]
FIG. 3 is a side cross sectional view showing a modification of the first embodiment of the
present invention.
[0020]
FIG. 4 is a front view of a cross section taken along a roro line in FIG. 3 in the arrow direction.
[0021]
FIG. 5 is a side cross-sectional view of a speaker device according to Embodiment 2 of the
present invention.
[0022]
FIG. 6 is a diagram showing frequency characteristics of the first and second embodiments of the
present invention.
[0023]
FIG. 7 is a side sectional view showing a conventional speaker device.
[0024]
Explanation of sign
[0025]
1 Speaker unit, 2 sound conduit, 2a ridge, 3 sound conduit inlet, 4 sound conduit outlet, 5 sound
absorbing material, 6 Helmholtz resonator.
17-04-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
description, jph0970090
1/--страниц
Пожаловаться на содержимое документа